fix: Bring back ccache support on new Xcode versions

[mateuuszzzzz]

Summary:

This Pull Request updates the build configuration to maintain compatibility with custom compiler launchers (ccache) in Xcode versions 16 and newer.

On newer Xcode versions, the method for using a custom compiler launcher has changed:

1. Instead of overriding CC, LD, CXX, and LDPLUSPLUS, we must now use the build setting C_COMPILER_LAUNCHER. This setting points to a universal C/C++ launcher.
2. An additional flag, CLANG_ENABLE_EXPLICIT_MODULES_WITH_COMPILER_LAUNCHER, must be explicitly set to YES to enable correct compilation of explicit modules when a launcher is present.

Changelog:

[IOS][FIXED] ccache functionality is restored for Xcode/xcodebuild versions >=16.
[IOS][BREAKING] This change removes ccache support for older Xcode versions that do not recognise the new compiler launcher settings. (Not sure if this is needed for backward compatibility, but it shouldn’t be difficult to add)

Test Plan:

1. Install pods for RNtester with USE_CCACHE=1 bundle exec pod install.
2. Build RNTester app for iOS. Check if cache is populated with ccache -s (the first run should show cache misses).
3. Delete build cache including derived data.
4. Build RNtester again. ccache -s should show cache hits, confirming the launcher integration works correctly.

[meta-cla]

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[mateuuszzzzz]

For context:

Without this change we would see lots of repeated warnings during build:

Explicit modules is enabled but the compiler was not recognized; disable explicit modules with
CLANG_ENABLE_EXPLICIT_MODULES=NO, or use
C_COMPILER_LAUNCHER with CLANG_ENABLE_EXPLICIT_MODULES_WITH_COMPILER_LAUNCHER=YES if using a compatible launcher

[react-native-bot]

This PR is stale because it has been open for 180 days with no activity. It will be closed in 7 days unless you comment on it or remove the "Stale" label.

[react-native-bot]

This PR was closed because it has been stalled for 7 days with no activity.